text: var lib = require("./lib");
  
  // Closed form solution for sum of squares
  function sumOfSquares(n) {
  	return n * (n + 1) * (2 * n + 1) / 6;
  }
  
  var sum = lib.sum(1,100,1);
  var sumSquares = sumOfSquares(100);
  
  console.log(sum * sum - sumSquares);